Fixes the workflow failure where `gh auth login --with-token` fails
because `GH_TOKEN` is already set in the environment.
The error was:
```
The value of the GH_TOKEN environment variable is being used for authentication.
To have GitHub CLI store credentials instead, first clear the value from the environment.
```
The fix uses a subshell to unset `GH_TOKEN` before calling `gh auth
login`:
```bash
echo "$GH_TOKEN" | (unset GH_TOKEN && gh auth login --with-token)
```
Release Notes:
- N/A
morgankrey
4db3b01acf